tropism

[troh-piz-uh m]
|

noun Biology.

an orientation of an organism to an external stimulus, as light, especially by growth rather than by movement.

Nearby words

  1. tropicalize,
  2. tropically,
  3. tropicbird,
  4. tropics,
  5. tropine,
  6. tropismatic,
  7. tropistic,
  8. tropo-,
  9. tropocollagen,
  10. tropologic

Origin of tropism

First recorded in 1895–1900; independent use of -tropism

Related formstro·pis·mat·ic [troh-piz-mat-ik] /ˌtroʊ pɪzˈmæt ɪk/, adjectivetro·pis·tic [troh-pis-tik] /troʊˈpɪs tɪk/, adjective

-tropism

variant of -tropy.

Origin of -tropism

see origin at -tropy, -ism

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tropism


British Dictionary definitions for tropism

tropism

noun

the response of an organism, esp a plant, to an external stimulus by growth in a direction determined by the stimulus
Derived Formstropismatic, adjectivetropistic (trəʊˈpɪstɪk), adjective

Word Origin for tropism

from Greek tropos a turn

-tropism

-tropy

n combining form

indicating a tendency to turn or develop in response to a certain stimulusphototropism

Word Origin for -tropism

from Greek tropos a turn

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for tropism

tropism

n.

1899, "tendency of an animal or plant to turn or move in response to a stimulus," abstracted from geotropism, ultimately from Greek tropos (see trope).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for tropism

tropism

[trōpĭz′əm]

n.

The turning or bending movement of a living organism or part toward or away from an external stimulus, such as light, heat, or gravity.
Related formstropic, tro•pistic adj.


-tropism

suff.

Tropism:stereotropism.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for tropism

tropism

[trōpĭz′əm]

The growth or movement of a living organism or anatomical structure toward or away from an external stimulus, such as light, heat, or gravity. See also geotropism hydrotropism phototropism.
Related formstropistic adjective

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.